Autodesk 00128-051462-9310 - AUTOCAD 2008 COMM UPG FRM 2005 DVD, Руководство пользователя

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5 Select an extrusion direction.
6 For each edge, select a position that corresponds to the view direction you want to assign to the face created
from that edge.
The edge positions that are available depend on the extrusion direction you selected.
7 Click OK.
Surface Hatches on Free Form Mass Elements
Free Form mass elements are created when you perform a Boolean operation on a standard mass element by adding,
subtracting or intersecting another mass element. The resulting mass element can be irregularly shaped. For more
information, see “
Mass Elements and Mass Groups ” on page 576.
When a mass element is converted into a Free Form mass element, all previous material assignments of the source mass
elements are lost. The new mass element reverts to the Standard material definition. You can assign another definition
to the new mass element.
Overriding the Surface Hatch on Individual Objects
The surface hatch specified for a material determines the display of objects that are assigned the material in elevation
and model views, as well as the appearance in rendered views. The material definition specifies which faces of
objects—Top, Bottom, Left, Right, Front, Back—display a surface hatch.
However, in some instances, you may want to override the surface hatch for a selected face of an object. For example,
you may want to turn off the surface hatch where it could obscure small details of an object when the drawing is
plotted.
Override Operations
You can change the surface hatches for faces of individual objects in the following ways:
■
hide the surface hatch
■
change the rotation of the surface hatch
■
change the vertical and horizontal offsets of the surface hatch
You can also specify whether the changes are applied only to the selected face or to all faces of the object with the same
direction—for example, to all front faces.
Multiple Surface Hatch Overrides
You don’t need to create separate overrides for individual changes; you can create one surface hatch override that is
both rotated and offset. In most cases, this is the preferred method of working. However, in some cases, you need to
assign more than one override. For example, suppose you want to rotate the surface hatch of all front faces of a column,
and you want to offset one individual front face. You first add an override for the rotation and select All Front Faces.
Then you add an override for the offset in which you select Only Selected Front Face.
Surface Hatches on Free Form Mass Elements | 517